Sailboat masts are not designed as structural columns; but given detailed specifications, a structural
engineer could calculate it’s load bearing capacity.
A
mast would require the addition of a base plate, and a [top] capital plate, to
work as a column.
Note: A column is a structural element that transmits load from above, to a supporting structure below. The word ‘column’ is associated, in particular, with elements that have a central shaft that is round [not oval-like] in section.
Here’s one manufacturer’s [of prefabricated aluminum columns] test specification, for comparison:
➥
https://mcmel.ca/wp-content/uploads/...test-sheet.pdf
Round 130 mm [5¼ in] diameter x 3,048mm [120 in] tall Aluminum Column
Maximal load test at break: 7913kg [17,445 lb]
Maximal load in projects [SF=2]: 3957 kg [8,723 lb]